Veeder-Root Red Jacket Maxxum Big-Flo Quick-Set Series, Инструкция по установке, эксплуатации и обслуживанию

Страница: 38 / 50

Service and Repair Repairing the Check Valve Lock-down Screw And Seals
34
3. Assembly
a. Be certain the two o-rings on the sealing face of the check valve housing are in place.
b. Lower the check valve assembly back down into the manifold taking care not to damage the rubber seal
on the check valve assembly.
c. Install the four 1/2 inch bolts. Torque these bolts to 50 ft-lbs (68 N•m).
d. Remove and discard the thread protector.
e. Re-attach the upper vent fitting then tighten both the upper and lower fittings1/6 to 1/4 turn beyond hand
tight.
4. Readjust the pressure adjustment screw to the desired pressure setting.
5. Replace the protective cover.
6. If applicable, open ball valve down line from the pump.
Repairing the Check Valve Lock-down Screw And Seals
Disconnect, lock out, and tag power at the panel before servicing the
pump.
When servicing equipment, use non-sparking tools and use caution when removing or installing
equipment to avoid generating a spark.
Care should be taken to ensure that the internal portions of the check valve housing
are clean and free of debris or contamination during servicing.
1. Close the ball valve in the discharge line if it has been installed.
2. Lock down screw removal (see Figure 22).
a. Remove the four wiper housing retaining screws.
b. Lift off the wiper housing from the lock-down screw.
c. Remove the wiper from the wiper housing. Avoid damaging the bores in the housing.
d. Unscrew the lock-down screw and remove it from the check valve housing.
3. Lock-down screw re-installation.
a. Replace the two o-rings on the lock-down screw. These o-rings should be installed from the non-threaded
end of the lock-down screw so as to avoid nicking or damaging the o-rings.
b. Sparingly lubricate the two o-rings before screwing the lock-down screw into the check valve housing.
Use light grease, oil, or petroleum jelly.
c. Using a flat piece of metal at least 1/2 inch larger than the OD of the wiper, carefully drive the new wiper
into the wiper housing, orienting the wiper as shown in Figure 22.
d. Sparingly lubricate the wiper ID lip before sliding it over the lock-down screw onto the check valve
housing. Use light grease, oil, or petroleum jelly.
e. Re-install the four #6 wiper housing retaining screws and torque to 20 in-lb (2.23 N•m).
4. If applicable, open the ball valve in the discharge line if it has been installed.
OFF
WARNING
WARNING